75% forward, really?
For any string, including the high E, the saddle NEVER needs to be adjusted forward. It's compensating for pressing down on a string and pulling it sharp; so you only intonate backward from the 'scale length' (ie. 24.75" on an LP).
In theory, your high E could be all the way forward; however, someone mentioned once giving a bit of wiggle room for innacurate drilling, so a millimetre or two of wiggle isn't a horrible idea; however, I'd think 75% is excessive (ie. an excessive amount of wiggle room), no? By giving your high E less wiggle room forward, you're giving your low E MORE wiggle room backward, in combination with a carefully chosen skew.
On the other hand, nothing at all wrong with doing it exactly the way StewMac and other diagrams recommend. Tried and true, after all! Not sure how much wiggle room the StewMac gives you.
Greg